How to Use Lost Energy Block in Sumeru and Locations

Lost Energy Block is an Item found all over Sumeru in Genshin Impact 3.0. Find out how to get all 19 Lost Energy Block Locations, how to use it to Load the Damaged Ruin Guards, and achievement rewards here!

Where to Get Lost Energy Blocks

Lost Energy Block Map Locations

There are a total of 19 Lost Energy Blocks found in Sumeru, around Port Ormos and Devantaka Mountain.

How to Get All Lost Energy Blocks

	Location
1	Found on top of a large gear in the middle of a Withering Zone. This will also be where a docile Ruin Sentinel will appear.
2	Found Next to a Damaged Ruin Guard and a Ragged Attendance Record.
3	Found on a Damaged Ruin Guard sitting by the water just north of the Sumeru Fishing Association.
4 - 7	Four Lost Energy Blocks can be found all around the camp of a group of Eremite enemies, along with a Remarkable Chest.
8	Found beside a Damaged Ruin Guard north of Port Ormos and south of Devantaka Mountain.
9	Inside the cave near the Lost Energy Block 11, southwards underground on a giant gear.
10	By a Damaged Ruin Guard resting under a tree, with a resting Ruin Drake nearby.
11	On a large flat gear at the base of the Huge Ruin Machine in Devantaka Mountain.
12	Found at the base of large gears on top of a rocky outcrop.
13	By a Damaged Ruin Guard at the top of the cliff.
14	Found at the end of a large pipe at the base of the Devantaka Mountain.
15	On a circular gear on the left side of Devantaka Mountain.
16	Inside a blocked cave with the entrance at Vimara Village. You will need the Vintage Lyre to open this cave.
17	Found in a large gear part by the side of the road.
18	Just inside the entrance to a flooded cave.
19	On a large flat gear at the bottom of the flooded cave. Draining the water in this cave is part of the Royinjan's Chapter: Linga Quest.

All Damaged Ruin Guard Locations

All Damaged Ruin Guards and Ruin Scouts

There are a total of 5 Damaged Ruin Guards to Load. Every Damaged Ruin Guard also has a corresponding Ruin Scout located nearby.

Giving energy to each Damaged Ruin Guard will award an Exquisite Chest, and loading all five Damaged Ruin Guards will give you an Achievement!

How to Use Lost Energy Blocks

Release and Follow the Ruin Scout

Follow the Ruin Scout to the Correct Ruin Guard

Each Ruin Scout will be inside a Dendro Rock Pile that you can destroy using a Dendrogranum and a charged attack. This Ruin Scout won't attack, and instead will act like a Seelie and guide you to a Damaged Ruin Guard.

Another Ruin Sentinel will spawn and you have to defeat both Ruin Sentinels to get an Exquisite Chest. Afterwards, you will be able to interact with the Damaged Ruin Guard and receive a new prompt to load it.

Load the Damaged Ruin Guard

You can use three Lost Energy Blocks to load into a Damaged Ruin Guard. It will start to repeat a string of numbers and symbols but otherwise remain unmoving.

This also means that you only need 15 Lost Energy Blocks in total to get the achievement. The other four Lost Energy Blocks currently have no other use.

No Other Known Uses

It seems that the Dead Ruin Guards and the Lost Energy Blocks are part of an abandoned research venture by a group called the 'Sumeru Investigation Team.'

We've yet to find out what the Ruin Guard's coded message means. Let us know in the comments if you've discovered the meaning of the Ruin Guards' Codes!

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Lost Energy Block Achievement

In the Name of Anfortas Achievement

Achievement	Rank	Primogem Reward
In the name of Anfortas	★	5 Primogems
Objective : Visit the place where the heroes met their end.

Restoring all 5 Damaged Ruin Guards will give you the In the Name of Anfortas Achievement, which rewards 5 Primogems!

Lost Energy Block Effects and Basic Information

Lost Energy Block	Rarity	1
	Type	Quest Items
	Effect	None

Blocks refined from pure energy. You can seemingly use it to activate the recording devices of some ancient constructs.

Genshin Impact Related Guides

Items and Materials

Other Sumeru Quest Items

All Sumeru Quest Items
Silver Twig	Garland	Scarlet Sand Slate
Fatui Stronghold Key	Glinting Component	Lost Energy Block
Record of the Tomb of Carouses	Sacred Seal Auricle	Sacred Seal Bird Head
Sacred Seal Ceremony	Sacred Seal Chisel Hammer	Sacred Seal Crocodile Head
Sacred Seal Danger	Sacred Seal Dune	Sacred Seal Forest
Sacred Seal Giant Serpent	Sacred Seal Grand Door	Sacred Seal Labor
Sacred Seal Precipice	Sacred Seal Raised Arm	Sacred Seal Right to Rule
Sacred Seal Sandstorm	Sacred Seal Sheep Head	Sacred Seal Sunrise
Sacred Seal Thunderstrike	Sacred Seal Valley	Vasmrti
Withered Kusava

List of All Quest Items

List of Quest Items